[Before the 1928 Flood Control Act, the Mississippi River flood control plan consisted of two basic elements: levees and outlets. Earthern levees would hold the water back. When necessary, outlets would be utilized to divert flood waters. In an emergency, more levees could be created with sandbags; more outlets could be created by blowing levees up. Here, a levee is dynamited to create an artificial crevasse — a crack or breach in a levee or dike — at Caernarvon, Louisiana, reducing pressure on levees in New Orleans.]
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[…] point. That point is called a crevasse. (As mentioned previously, crevasses can also be created intentionally to produce emergency […]